{"cve":"CVE-2013-1895","nvd":{"published":"2020-01-28T15:15:14.343","modified":"2026-06-16T23:52:19.253","status":"Modified","description":"The py-bcrypt module before 0.3 for Python does not properly handle concurrent memory access, which allows attackers to bypass authentication via multiple authentication requests, which trigger the password hash to be overwritten.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","score":7.5},"cwes":["CWE-307"],"references":["http://lists.fedoraproject.org/pipermail/package-announce/2013-April/101382.html","http://lists.fedoraproject.org/pipermail/package-announce/2013-April/101387.html","http://www.openwall.com/lists/oss-security/2013/03/26/2","http://www.securityfocus.com/bid/58702","https://exchange.xforce.ibmcloud.com/vulnerabilities/83039"],"products":["fedoraproject:fedora","python:py-bcrypt"],"source":"nvd","synced_at":"2026-10-19T21:01:01.339895972+00:00"},"epss":{"cve":"CVE-2013-1895","score":0.02835,"percentile":0.86639,"date":"2026-11-01"},"kev":null,"osv":[{"id":"GHSA-r838-q6jp-58xx","url":"https://osv.dev/vulnerability/GHSA-r838-q6jp-58xx","summary":"Improper Restriction of Excessive Authentication Attempts in py-bcrypt","modified":"2024-10-21T20:25:28.584726Z","packages":[{"ecosystem":"PyPI","name":"py-bcrypt","purl":"pkg:pypi/py-bcrypt","ranges":["<0.3"],"fixed":["0.3"]}]},{"id":"PYSEC-2020-249","url":"https://osv.dev/vulnerability/PYSEC-2020-249","summary":"","modified":"2023-11-08T03:57:16.070357Z","packages":[{"ecosystem":"PyPI","name":"py-bcrypt","purl":"pkg:pypi/py-bcrypt","ranges":["<0.3"],"fixed":["0.3"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}